Hydraulic transmission device.



PATENTED JUNE 25, 1907.

W. G. SGHWARZ. RAULIG TRANSMISSION DEVICE.

APPLIUATION FILED MAY 29.1906.-

HYD

UNITED STATES PATENT OFFICE.

HYDRAULIC TRANSMISSION DEVICE.

Specification of Letters Patent.

Patented June 25, 1907.

Application filed May 29, 1906. Serial No. 319,357.

To all whom it may concern:

Be it known that 1, WILLIAM C. SCHWARZ,

a citizen of the Uni ted States, and a resident of Edwardsville, Madisoncounty, Illinois,

have invented certain new and useful Improvements in HydraulicTransmission Devices, of which the following is a specificationcontaining a full, clear, and exact description, reference being had tothe accompanying drawings, forming a part hereof.

My invention relates to a hydraulic transmission device, and the objectof my invention is to construct a simple, inexpensive device, comprisinga minimum number of parts, which may be utilized for transmitting rotarymotion from one shaft to another,as, for instance, from an engine shaftto a driven shaft; and which device may be readily and accuratelyadjusted so-as to vary the speed of the transmitted rotary motion.

A further object of my invention is to construct a device fortransmitting rotary motion, wherein the friction and the gear wheels,such as are usually employed in devices of this class, are entirelydispensed with, thereby greatly reducing the size and cost of atransmission device.

My invention consists in a drum, in which one end of the driven shaft ismounted, and which drum is divided into two compartments, each filledwith a suitable'fluid, there being a pair of meshing pinions arranged onthe interior of the drum, one of which is fixed on the engine shaft; andwhich pinions carry the fluid from one compartment to another, and avalve located between the compartments for controlling the circulationof fluid.

My invention further consists in certain novel'features of constructionand arrangement of parts, which will be hereinafter more fully setforth, pointed out in the claims, and illustrated in the accompanyingdrawings, in which:

Figure 1 is a side elevation of a transmission device of my improvedconstruction; Fig. 2 is a vertical section taken on the line 22 of Fig1; Fig. 3 is a vertical section taken on the line 33 of Fig. 1; Fig. 4is a detail section taken on the line 4-4 of Fig. 2, Fig. 5'is aperspective view of the valve I make use of in my improved transmissiondevice. I

Referring by numerals to the accompanying drawings :1 designates a drumin which is formed two oppositely arranged compartments 2. Formedbetween these compartments by a suitable web, or wall, 3, is a circularvalve chamber 4, and ports 5 areformed through the web 3, thusestablishing communication between the chambers 2 and the chamber 4.Formed between the chambers 2, below the valve chamber, and surroundedby the semicircular walls 6, is a pair of circular chambers 7, and ports,8 are formed through the walls 6 on opposite sides thereof, in order toestablish communication between the chambers 2 and 7.

the opposite chamber 7 is located to one side of said drum, and directlyopposite the valve chamber 4.

One of the sides of the drum is closed by a removable plate 9, in thecenterof which is formed a bearing 10, provided with a suitable gland,or stuffing box 11, and in said bearing 18 arranged for rotation theengine or motor shaft 12. The end of this shaft terminates immediatelyagainst the rear wall of the drum 1, and fixed on said shaft, within thechamber 7 that is formed in the center of the drum is a pinion 13. Theteeth of this pinion are of considerable depth, and the outer endsthereof fit snugly agamst the interior of the .wall 6 surrounding thecentral chamber 7.

Formed on the late 9, and on the outer face of the rear wa l of the drum1 are bearings 14, which are in alinement with the center of the lowerone of the chambers 7, and arranged for rotation in said bearings 14 arethe trunnions of a pinion 15, which is of the same size and meshes withthe pinion 13. The outer ends of the teeth of this pinion 15 bearagainst the inner face of the wall 6 surrounding this lower chamber 7.

Arranged for operation in the valve chamber 4 is a cylindrical valve 16,through which is formed an opening 17, and which opening is adapted tocoincide with the ports 5 in the wall, or web, 3. The stem 18 of thisvalve extends through the rear wall of the drum 1, and rigidly fixedthereon is a disk 19, in the peri hery of which is formed a series ofteet 20.

A hub 21 is formed integral with the outer face of the rear wall of thedrum 1, and rig- One of the chambers 7 is arranged at the center of thedrum 1, and

idly fixed in said hub, and in direct alineon the disk 19. A retainingscrew 26 passes through the sleeve 23, and enters an annular groove 27formed in the outer portion of the ub 21. Formed in the sleeve 23 is aspirally disposed slot 28, which extends around said sleeveapproximately onequarter of its circumference. Arranged to slide on theshaft 22, and within the sleeve 23, is a collar 29, there being alongitudinally extending groove 'on the interior thereof, and extendinginto said groove is a pin 30, which is rigidly seated in the shaft 22.Thus, said collar 29 is arranged to rotate with and slide longitudinallyupon the shaft 22. Seated in the inner'end o the collar 29 is a pin, orscrew, 31, which extends through the spirally arranged slot 28. Formedin thebuter end of the collar 29 is a groove 32, in which is; arrangedthe fingers ofa yoke 33, which is pivoted in such a manner as that whenmanipulated, it Will move the collar 29 longitudinally upon the,

shaft, and into or out of the sleeve 23.

The entire space within the drum 1, comprislng the compartments 2 and 7,is filled with a suitable heavy liquid, such as lubricating o1l, orglycerin, and which liquid is introduced 1nto the drum through asuitably located aperture, closed by a screw plug such as 34. Theoperation of the transmission device s as follows: The engine or motorshaft being rotated Will necessarily drive the pinion 13 in the centerof the drum 1, and sald pinion will impart rotary motion to the inion15, with which it meshes. Following t 1is rotation of the pinions, theliquid in one of the compartments 2 will be drawn into the-compartments7 through-one of the ports 8, and dlscharged through the opposite port 8into the opposite compartment 2 and said liquid will pass from thencethrough the open valve 16 back to the first compartment 2, and thus acontinuous circulation of the liquid is maintained as long as the valveis open. As lon as said valve remains open to 'allow the ree circulationof the liquid om one compartment 2 to the other, the pinion 13 willcontinue t rotate in the center of the drum 1, and said drum and partscarried thereby will remain stationary, and no rotary motion will betransmitted from the shaft 12 to the shaft 22. When it is desired torotate the shaft 22, the operator manipulates the yoke 33 so as to movethe 31 in the spiral slot 28.

collar 29 into the sleeve 23, and, as a result, said sleeve will berotated one-quarter of a turn, owing to the arrangement of the screwThis action rotates the flange 24 approximately one-quarter. of a turn,thus rotating the disk 19 one-quarter of a turn, and thus closing thevalve 16, or so slower speed than does the shaft 12.

rotating the same as that the opening 17 is out of alinement with theports 5. This action' shuts off the circulation of the liquid from onecompartment 2 to the other, and, as a result, the pinion 13 can nolonger drive the pinion l5, and said pinion which is carried by the drum1 will thus be locked to said pinion 13, and the drum and parts carriedthereby will necessarily rotate with the shaft 12, thus imparting therotary motion thereof to the shaft 22.

The valve 16 can be so rotated by its operating mechanism as to allowbut a very slight circulation-of liquid through the opening in saidvalve,- and this adjustment will cause the shaft 22 to rotate at aslightlly T 1e valve can be thus adjusted so as to very accuratelyregulate the speed transmitted to the shaft 22, which adjustment andregulation may take place while the device is in operation.

A hydraulic transmission device of my improved construction isapplicable for use wherever it is desired to transmit rotary motion,comprises a minimum number of parts, can be easily taken apart forrepair, and does away with a great deal of gearing and friction wheelsusually employed in transmis-' sion devices.

I claim:

In a hydraulic transmission device, the combination with a pair ofalined shafts, of a drum rigidly fixed on the end of one of the shafts,in which drum is formed a pair of oppositely arranged chambers, a pairof meshing pinions arranged for operation within the drum between thechambers therein, one of which pinions is fixed on the shaft oppositethe shaft to which the drum is fixed, a rotary valve arranged between.the two chambers within the drum, a toothed segment fixed on one end ofthe valve outside the drum, a hub integral with the drum, a toothedsegment arranged for rotation on said hub, a sleeve integral with saidsecond segment, in which sleeve is formed a spirally arranged slot, acollar arranged to rotate with and slide upon one of the shafts withinthe sleeve, a' pin seated in the collar and extending through thespirally arranged 'slot, there being a groove formed in the outer end ofthe collar, and a hook engaging in said groove for, imparting movementto said collar.

In testimony whereof, I have signed my name to this specification, inpresence of two subscribing witnesses.

WILLIAM C. SCHWARZ. Witnesses:

EDWARD E. LONGAN, M. PISMITH.

